초록 ▼

The temperature of a product which is being chilled in a blender by introducing carbon dioxide in solid and gaseous form into the blender is controlled by sensing the power drawn by the drive motor coupled to the impeller. The power drawn by the motor is sensed and analyzed and, upon reaching a pred

The temperature of a product which is being chilled in a blender by introducing carbon dioxide in solid and gaseous form into the blender is controlled by sensing the power drawn by the drive motor coupled to the impeller. The power drawn by the motor is sensed and analyzed and, upon reaching a predetermined value, the introduction of CO2 into the blender is terminated. As the product is chilled by contact with CO2 in the blender, the viscosity of the product will increase, which in turn, increases the power drawn by the motor. Variations in line voltage supplied to the motor and changes of the initial temperature of the product being chilled do not affect the final temperature to which the product may be accurately chilled.

대표청구항 ▼

A method for controlling the temperature to which a product is chilled in a blender having a rotatable impeller adapted to be driven by an electric motor comprising the steps of introducing solid CO2 into said blender and into contact with said product; energizing said motor to drive said impeller,

A method for controlling the temperature to which a product is chilled in a blender having a rotatable impeller adapted to be driven by an electric motor comprising the steps of introducing solid CO2 into said blender and into contact with said product; energizing said motor to drive said impeller, thereby mixing said solid CO2 with said product to chill the same, the improvement comprising the steps of: sensing the electrical power drawn by said motor; comparing the sensed power with a predetermined power value and terminating the introduction of solid CO2 into the blender upon the actual power drawn by said motor reaching said predetermined value.